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Subject: [OASIS Issue Tracker] Updated: (ODATA-528) $entity should require cast segment in order to apply $select/$expand

     [ http://tools.oasis-open.org/issues/browse/ODATA-528?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael Pizzo updated ODATA-528:

    Environment: [Applied to [Protocol]]. Abnf needs to be updated.  (was: [Proposed])

> $entity should require cast segment in order to apply $select/$expand
> ---------------------------------------------------------------------
>                 Key: ODATA-528
>                 URL: http://tools.oasis-open.org/issues/browse/ODATA-528
>             Project: OASIS Open Data Protocol (OData) TC
>          Issue Type: Bug
>          Components: OData ABNF Construction Rules, OData Protocol 
>    Affects Versions: V4.0_CS01
>         Environment: [Applied to [Protocol]]. Abnf needs to be updated.
>            Reporter: Michael Pizzo
>            Assignee: Michael Pizzo
>             Fix For: V4.0_CSD03
> Given an opaque id for an entity, the client can get the instance using the new /$entity resource and providing the id through the $id query option, such as:
> http://host.service/$entity?$id=urn:mysvc5304-98001-7832-4425
> This can be cast to a particular type:
> http://host.service/$entity/myservice.Customer?$id=urn:mysvc5304-98001-7832-4425
> And any of the query options supported for a single resource can be applied:
> http://host.service/$entity/myservice.Customer?$id=urn:mysvc5304-98001-7832-4425?$select=LastName&$expand=Orders
> However the text current does no require the cast in order to apply $select and $expand. This is a bug, because without the cast a parser cannot determine whether the $select and $expand are valid without actually retrieving the object and discovering its type.
> Everywhere else we consistently require casting to the correct type in order to access members of that type.
> Also, I think there is a bug in the ABNF as it doesn't appear to allow for the cast segment:
> '$entity' "?" entityOptions  

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